Elsevier

Nuclear Physics A

Volume 367, Issue 1, 31 August 1981, Pages 1-12
Nuclear Physics A

Hyperfine structure and isotope shift of the D2 line of 118–145Cs and some of their isomers

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Abstract

High-resolution laser spectroscopy has been performed on118–145Cs and 119m, 121m, 122m, 130m, 134m, 135m, 136m, 138m,Cs.The Cs nuclei have been produced either by spallation of La or by fission of U by the 600 MeV proton beam, from the SC at CERN. The hyperfine structures, spins, and isotope shifts have been measured. The charge radii changes deduced from the isotope shifts exhibit shell effects at N = 82, isomeric staggering for N = 64,66,67 and a strong odd-even staggering for all isotopes with N < 82.

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    Permanent address: University of Bonn, D-5300, Bonn, Germany.

    ∗∗

    Laboratoire associé à l'Université Paris Sud.

    ∗∗∗

    Permanent address: Service de Physique Atomique, Centre d'Etudes Nucléaires Saclay, France.

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